Holistic medicine aims to provide healthcare for the “whole” person. While it's a worthy approach, the term has also been used to advance ideas, including in dentistry, at odds with solid scientific evidence.

Here are 4 “holistic” oral health claims and why you should be wary of them.

Root canals are dangerous. It might be shocking to learn that some claim this routine tooth-saving procedure increases the risk of disease. The claim comes from an early 20th Century belief that leaving a “dead” organ like a root-canaled tooth in the body damages the immune system. The idea, though, has been thoroughly disproved, most recently by a 2013 oral cancer study that found not only no evidence of increased cancer, but an actual decrease in cancer risk following root canal treatment.

X-rays are hazardous. X-rays have improved tooth decay treatment by allowing dentists to detect it at earlier stages. Even so, many advise avoiding X-rays because, as a form of radiation, high levels could damage health. But dentists take great care when x-raying patients, performing them only as needed and at the lowest possible exposure. In fact, people receive less radiation through dental X-rays than from their normal background environment.

Silver fillings are toxic. Known for their strength and stability, dentists have used silver fillings for generations. But now many people are leery of them because it includes mercury, which has been linked to several health problems. Research concludes that there's no cause for alarm, or any need to remove existing fillings: The type of mercury used in amalgam is different from the toxic kind and doesn't pose a health danger.

Fluoride contributes to disease. Nothing has been more beneficial in dental care or more controversial than fluoride. A proven weapon against tooth decay, fluoride has nonetheless been associated with ailments like cancer or Alzheimer's disease. But numerous studies have failed to find any substantial disease link with fluoride except fluorosis, heavy tooth staining due to excess fluoride. Fluorosis, though, doesn't harm the teeth otherwise and is easily prevented by keeping fluoride consumption within acceptable limits.

Each of these supposed “dangers” plays a prominent role in preventing or minimizing dental disease. If you have a concern, please talk with your dentist to get the true facts about them.